A bicycle wheel is mounted vertically on a metal axle in a horizontal magnetic field, as shown
Question:
A bicycle wheel is mounted vertically on a metal axle in a horizontal magnetic field, as shown in the diagram. Sliding connections are made to the metal edge of the wheel and to the metal axle.
a. i. Explain why an e.m.f. is induced when the wheel rotates.
ii. State and explain two ways in which this e.m.f. can be increased.
b. The wheel rotates five times per second and has a radius of 15 cm. The magnetic flux density may be assumed to be uniform and of value 5.0 × 10−3 T.
Calculate:
i. The area swept out each second by one spoke
ii. The induced e.m.f. between the contacts.
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a i An emf electromotive force is induced in the wheel when it rotates because of Faradays law of el...View the full answer
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Related Book For 
Cambridge International AS And A Level Physics Coursebook
ISBN: 9781108859035
3rd Edition
Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside
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